Hello i built my computer about 2 years ago and i made one mistake which is getting 2 hdd hard drives. i want to change that and get 2 sdd with probably 150GB each because 2 years ago i built specifically for gaming and now that my dad started his own business i will be working their.

Question 1.

how can i transfer my OS(windows 10)-----i got for free

do i have to buy a new OS or am i able to transfer it by raid ?

thank you.